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Blog posts tagged
"Linux kernel"

Rajan Patel
2 July 2025

Live Linux kernel patching with progressive timestamped rollouts

Security Article

In internet connected environments, where Ubuntu instances can reach livepatch.canonical.com, Livepatch Client supports timestamp-based rollout configurations. Organizations can implement controlled and predictable update pipelines from staging to production environments, without the hassle of deploying a self-hosted Livepatch Server, and ...

Rajan Patel
1 July 2025

Update Livepatch Client for the newest kernel module signing certificate

Security Article

The kernel engineering team at Canonical has generated a new module signing certificate on May 16, 2025, and it is embedded in all Ubuntu kernels published after that date. Livepatch Client version 10.11.2 published on June 13, 2025 includes this new certificate. Livepatch Client 10.11.2 or greater is required to successfully Livepatch al ...

Rajan Patel
31 March 2025

Automated patching for the Linux kernel

Security Article

To start securely and efficiently, Linux systems follow a carefully orchestrated sequence of steps to initialize firmware and manage services. Applying security patches to the software responsible for some of these early steps of Linux startup often requires a full system reboot. Frequent reboots driven by unplanned critical patching is d ...

arighi
26 February 2024

Crafting new Linux schedulers with sched-ext, Rust and Ubuntu

Ubuntu Article

In our ongoing exploration of Rust and Ubuntu, we delve into an experimental kernel project that leverages these technologies to create new schedulers for Linux. Playing around with CPU scheduling policies has always been a dream for many kernel hackers and OS enthusiasts. However, such material typically remains within the domain of a fe ...

arighi
31 August 2023

Get familiar with “Rusty” kernel programming in Ubuntu Lunar Lobster

Ubuntu Article

The Linux kernel has recently introduced the Rust programming language as an alternative to C for creating kernel modules. Rust is a strongly, statically typed programming language with a focus on memory safety features which produces extremely compact executable code. These properties, paired with its good tooling, make Rust a natural ch ...